Molding machine



J. W. DAVIS.

MOLDING MACHINE.

APPLICATION FILED JUNE I7, 1920.'

1,41 0 ,1 72. Pa'wnted Mar- 21, 1922.

3 SHEETS-SHEET lwitmeoo 1. w. DAVIS.

MOLDING MACHINE.

APPLICATION FILED JUNE 17, I920.

1,410, 172. Patented Mar. 21, 1922.

3 SHEETSSHEET 2.

Wikuwo --f I I Gamma J. W. DAVIS.

MOLDING MACHINE. APPLICATION FILED JUNE 17. 1920.

1,410,172. Patented Mar. 21,1922.

3 SHEETS-SHEET 3- 33 Wit/wean m /34 7 provided with a ring 9 which UNITED STATES JOHN WILLIAM DAVIS, OF CINCINNATI, OHIO.

MOLDING MACHINE.

Specification of Letters Patent.

Patented Mar. 21, 1922.

Application filed June 17, 1920. Serial No. 389,650

T 0 all whom it may concern:

lie it known that 1, JOHN WILLIAM DAVIS, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Molding Machine, of which the following is a specification.

The device forming the subject matter of this application is adapted to be used for making molds of the kindin which a metal pipe is cast and the invention aims to provide novel means whereby the mold may be fashioned readily, whether the mold be of curved form or straight.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

\Yith the above and other objects in View, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what it claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side elevation, a device constructed in accordance with the invention, parts appearing in section; Figure 2 is a front. elevation; Figure 3 is a horizontal section taken approximately on the line 3-3 of Figure 1; Figure fl: is a horizontal section taken approximately on the line 4- 1 of Figure 1; and Figure 5 is a section taken on the line 5-5 of Figure 1. V The numeral 1 marks a pit or foundation wherein are located pedestals 2. The nunieral 3 designates a main frame, mounted as indicated at a on the pedestals 2 to swing about a horizontal axis.

A table Sis provided, the same being supported for adjustment on jacks 6 carried by the forward portion of the main frame 3, the table having an opening 8 and being serves to retain the sand against falling through the opening 8, the ring serving, at the same time, to shape the end of the mold. The forward end of the main frame 3 is supported on a prop 7 located in the pit 1 and one prop may be substituted for another,

thereby to vary the angle of the frame 3 with respect to the horizontal, when the ment.

frame is tilted on its pivotal mounting 4.

A. casing 10 of curved form is supported on i the table 5. g

In the rear portion of the main frame 1 there are openings 11, adapted to cooperate with openings 12 and auxiliary frame 14, to receive a pivot bar 15,whereby the aux iliary frame lt is mounted on the main frame 3 for tilting movement In a vertical plane about an axis represented by the pivot bar. Any suitable means may be provided v for tilting the auxiliary frame 14: on the vertical axis represented by the pivot bar 15. In the present embodiment of the invention, the ends of a fixible element 16 are made fast to the auxiliary frame 14, adja cent to the top thereof, the flexible element being extended across idlers 17 in the pit 1 and around a drum 18 which is powerdriven.

A bracket 19 is mounted on the auxiliary bracket including a bearing 20 wherein a sleeve 21 is mounted for longitudinal move- So far as the present discussion is concerned, the longitudinal movement of the sleeve 21 may be disregarded, the sleeve constituting a means for supporting rotatably, a shaft 22, the upper end of which is journaled in a bearing 23 on the upper end of the auxiliary frame it. There are set collars 24 on the shaft 22, the set collars cooperating with the ends of the sleeve 21 to hold the shaft against longitudinal movement in the sleeve. The shaft 22 is splined as indicated at 25 into a beveled gear wheel frame 14 and constitutes a part thereof, the

26 meshing with a beveled pinion 27 on the shaft of a motor 28 which may be driven electrically, the motor being mounted on the upper end of the auxiliary frame 14.

A hub 29 is fixed to the lower end of the.

shaft 22 and has arms 30, into which extensions 31 are dovetailed as shown at 32in Figure 5. The extensions 31 may be slid inwardly and outwardly on the arms 30. and in Order to hold the-extensions in any the clamp screws being adapted to bear on the arms. Packing rollers 35 are journaled on the outer ends of the extensions 31 for rotation on axes parallel to the axis of the shaft. 22.

The numeral 36 denotes an annular core 7 The core 36 does not participate in the rotation of the shaft 22 but remains fixed against rotation, being held thus by the friction of the, molding sand. Set-V collars 38 are mounted on the shaft 22, one set collar cooperating with thecore 36 to limit theupward movement thereof. The core 36 is dis'osed abovethe packing rollers35, and a ove the core is disposed a clamp 39,

thesame bein engaged with shaft 22, be-

pinion 4 1 ournaled on the upper end of the tween the col ars 38, the clamp being secared to the shaft. The clamp 39 has outstanding arms 40 to which BXtGDSlOIlS 41 are secured, the extensions carrying packing 6D time, rotate onhorizontal axes. 'The rollelements, such anthers, packing rollers being mounted to rotate on axes substantially at right anglestoj the axis of rotation of the shaft22. Scrapers 13, in the form of blades, are secured to the extenslon 41 are operated infront of the packing rollers 42. At this point, the description of the mechanism may be suspended profitably, 1n order to oint out the operation of the device.

he table 5 maybe adjusted with respect to the forward end of theframe 3,

by manipulating the jacks 6. The casing.

10. is mounted on thejtable o and the auxiliary frame 145 is swung on its pivotal mounting 15 until the packing rollers 35 are located in the opening 8 of the tablefi.

The moldingsand is shoveled into thetop of the casing 10 on top of the annular core 36, Rotation is imparted to the drum 18, the flexible element 16 tiltingthe auxiliary framef 14 rearwardly on an arc the center of which is the pivot bar 15. Obviously, when the auxiliary frame 14 is tilted as aforesaid, the packing rollers 35 and the core 36, together with the parking rollers 42, will move upwardly and rearwardly on an arc,so as to form, the sand mold with the proper curvature, as will be understood clearly when Figure 1 of the drawings is noted. a

The motor 28 operates the beveled pinion 27, the beveled p1nion27 driving the gear wheel, 26, rotation being imparted to the shaft-22l When the shaft 22 is rotated, the rollers 35 move inlan orbit and rotate on their axes, the sand being packed outwardly against the casing 10, notably in view of the fact that the rollers 35 taper toward their upper ends. j The sandis packed above and in advance of the rollers 35 by the core 36, the core further preventing the sand from whopping downwardlybetween the rollers 35. VVhenthe shaft 22 is rotated, the rollers 42 move in an orbit,and. at the same ers42 serve to pack the sand downwardly about the periphery of the annular core,

56 on the rack 57, the shaft 22 sliding up- 36. The scrapers 43, which are located in advance of the rollers 42, serve to smooth down and level off the sand in advance of the said rollers. r

The a mechanism hereinbefore described, and the operation last above set forth, presupposes that mold of tubular form and of curved configuration is to be fashioned. The machine, however, may be so adjusted that, at any time, a curved mold may run off into a straight cylindrical part. The mechanism for accomplishing the result mentioned will now be described.

The gear wheel 26 meshes into a beveled shaft 50 but is adapted to be coupled thereto by an internal clutch which need not be described in detail since, per se, it constitutes no part of the present invention, Let

On the lower endof it suffice to say that the clutch is operated by a member 51 located outwardl of a hand wheel 52 on the shaft 50. The shaft 56 is provided with a worm 53 meshing into a Worm wheel 5& on shaft 55 journaled in the bracket 19 and provided with a pinion 56 meshing into a rack 57 on the sleeve 21 wherein the shaft 22 is journaled.

lVhen' the machine isoperated, as above described, to form a'curved mold, the beveled gear wheel 19 is uncoupled by the clutch mechanism 51 from the shaft 50; but when a straight mold section is to be turned out, then the beveled gear wheel 49 is coupled to the shaft 50 bvthe clutch mechanism 51. When the beveled gear wheel 49 is coupled to the shaft 50, the rotation of. the drum 18 stopped. and consequently, the auxiliary frame 14 does not tilt in a vertical plane on ts ZLXJS 15. Then, when the motor 28 is put into operation, the shaft 22 and parts car ried thereby will be rotated as hereinbefore set forth. At the same time, therewill be put into operation, a driving train comprismg the gear wheel 26, the beveled'pinion 4 1,

the beveled-pinion 15, the beveled pinion 46, the shaft 47. the beveled pinion 418, the beveled gear wheel 49, the shaft 50, the worm 53, the worm wheel 54, the shaft 55,

the set collars 124 prevent the shaft 22 from moving endwise independently of the collar 21, the shaft 22 wvill be raised when the sleeve 211s raised bythe action of thepinion wardly through the gear wheel 26, and the the pinion 56 and the rack 57. Since the rack 57 is located on thesleeve 21, and since driving relation between the shaft 22 and the gear wheel 26 being maintained, because the shaft is splined at 25 to the gear wheel. Clearly, when the shaft 22 is raised above explained, and rotated, a straight mold section is fashioned.

Since the main frame 3 can be tilted on the axis l to assume different positions with respect to the horizontal, the proper adjustment may be made, upon the radius of which the mold is to be curved. Noting Figure 5 of the drawings, it will be recalled that the packing rollers 35 may be moved inwardly and outwardly, so as to adapt the machine to molds of different diameters and to molds having different wall thicknesses. The packing rollers 42 may be shaped as required, to put the desired finish on the up per end of the mold, one sort of a roller being necessary in connection with a bell and spigot pipe and other forms of rollers being necessary for pipes which are coupled otherwise than by a bell and spigot joint.

Having thus described the invention, What is claimed is 1. In a device of the class described, a main frame; an auxiliary frame mounted to tilt on the main frame; means for tilting the auxiliary frame; a casing on the main frame outwardly acting packing means supported rotatably on the auxiliary frame and operating in the casing; and mechanism for imparting rotary n'iovement to the packing means.

2. In a device of the class described, a

main frame; an auxiliary frame mounted to tilt on the main frame; means for tilting the auxiliary frame; a casing on the main frame; outwardly-acting packing means supported rotatably on the auxiliary frame and operating in the casing; and mechanism for imparting movement to the packing means in the direction of the axis of rotation of packing means.

In a device of the class described, a main frame and an auxiliary frame mounted to tilt on approximately parallel axes; means for holding the auxiliary frame in adjusted positions; means for tilting the auxiliary frame' a casin on the main frameout- 7 b 7 wardly-acting packing means supported for rotation on the auxiliary frame and operating in the casing; and mechanism for moving the packing means in the direction of the axis of rotation of the packing means.

4, In a device of the class described, a casing; a frame; a shaft journaled in the frame; and packing means carried by the shaft and operating in the casing, said packing means comprising rollers journaled on axes substantially parallel to the shaft and substantially at right angles to the shaft.

5. A device of the class described, constructed as set forth in claim 4:, and further characterized by the provision of a core on the shaft and located between the rollers on the normal axes and in advance of the rollers on the parallel axes.

6. A device of the class described, constructed as set forth in claim 4: and further characterized by the provision of a smoother operating in the path of the roller which is mounted to turn on an axis substantially at right angles to the shaft.

7.- In a device of the class described, a main frame and an auxiliary frame mounted to tilt on approximately parallel axes; means for holding the auxiliary frame in adjusted positions; means for tilting the auxiliary frame; a casing on the main frame; outwardly acting packing means supported for rotation on the auxiliary frame and operat ing in the casing; and mechanism for imparting rotary movement to the packing means.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

. JOHN WILLIAM DAVIS. \Vitnesses MILTON SAYLER,

RoB'r. L. HEITZMAN. 

